Journal ArticleUnknown
Atmospheric Polycyclic Aromatic Hydrocarbons (PAH) in Manipur of the Northeast India: Monitoring on Urban, Rural, and Mountain Sites
Author Affiliations
Central University of South Bihar, China University of Geosciences, SRM Institute of Science and Technology, SRM University
Published InPolycyclic aromatic compounds
Year2013
Citations24
Abstract
A passive air sampling was conducted to measure polycyclic aromatic hydrocarbon (PAH) in ambient air of Imphal (urban), Thoubal (rural), and Waithou (mountain) of Manipur, Northeast India from January 2009 to December 2009. The mean PAH concentrations of urban air (235.6 ng/m3) were high compared to rural (206.3 ng/m3) and mountain (202.1 ng/m3). PAH compounds with 2- to 3-aromatic rings were predominant. Monthly variation of PAH concentration showed seasonal dependence exhibiting higher concentration during autumn and winter compared to spring and summer. Diagnostic ratio of specific PAH compounds suggests emission from diesel-powered vehicles and gasoline-powered vehicles could be major sources of contamination while coal burning emits high PAH in rural Manipur. Principal component analysis confirmed low molecular weight and medium…
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